Joe H. suggested Tony's Riverhouse in Benedict on the rumor that it the original chef from Stoney's Broome Island had moved to Tony's. I cannot verify who was in the kitchen, but I can verify that Tony's has an excellent crabcake: all lump and no filler, just a creamy binding agent that complements the crab flavor.
I also had the blackened scallop appetizer, and it was excellent. The scallops were cooked to perfectly soft, and the blackening was not over-spiced.
A word about the setting: Tony's is right on the Patuxent River, but unfortunately, it is not an outdoor dining experience. Instead it has white table clothes, but not a great many tables. I looked over the wine list, which was mainly pedestrian (wines listed without vintages) but did not appear greatly marked up.
Where would I put Tony's in the crabcake heirarchy? Above Stony's (although I prefer the Broome Island outdoor deck) but behind Jerry's Crab Bomb.
Relatedly (or maybe not), I also went by Scheibel's (which is just near Point Lookout Marina). The entire restaurant had been reserved for a birthday party, leaving me totally out of luck. So I tried to find Courtney's, which is north of Scheibel's. I had seen its sign on the drive down but could not find it again in the dark. The word is that the owner of Courtney's catches the fish in the morning and serves it that day. I'm sorry I missed that, too.